Door-opener.



3SHEETS-SHEET I.

Patented Dec. 31, 1918.

E. LOVEJOY.

DOOR OPENER.

APPLICATION FILED AUG.2.1918.

1/91/114 zoo E. LOVEJOYA DOOR OPENER.

APPLICATION men Aue.2. 191s Patented Dec. 31, 1918.

3 SHEETSSHEET 2.

Snow H501 525?? Lia M m a M W E. LOVEJOY.

DOOR OPENER.

APPLICATlON FILED AUG.2.1918.

Patented Dec. 31, 1918.

3 SHEETS-SHEET- 3- awuawiioz DOOR OPENER.

Specification of Letters Patent.

Patented Dec. 31,1918.

Application f led August 2, 1918. Serial No. 248,031.

To all whom it may concern:

Be it known that I, ELMER LovEJoY, a citizen of the United States,residing at Laramie, in the county of Albany and State of lVyoming, haveinvented a new and useful Door-Opener, of which the following is aspecification.

T he object of my invention is to provide certain improvements forregulating and automatically controlling the operation of apower-operated door opener.

This is an improvement upon the invention patented to me March 26, 1918,Patent No. 1,260,561.

In the accompanying drawings illustrat ing my invention Figure 1 is aside elevation of myinvention applied to a door, with the door moved tolowered position (the main portion of the door being broken away) andwith the brake applied, and the electric switch open;

Fig. 2 is a side elevation from the reverse side of the apparatus,showing the arm 2 engaged by latch 4, the electric switch slightly open,and the apparatus in position in which pressure of the brake isreleased; the change of position of arm 2 and switch 6 when arm 2 isengaged by latch 16 being shown in dotted lines;

Fig. 3 is a bottom plan of the apparatus as viewed looking up on sectionline 33 of Fig. 2; and

Fig. 4 is a vertical section on line 4-4 of Fig. 2.

Like characters of reference designate like parts throughout the severalviews.

Referring to the accompanying drawings, I provide a suitable frame 24,on which is mounted an .axle 26, carrying ,a suitable drum 11, to whichone end of a suitable cable 10 is secured.

The other end of cable 10 is suitably secured by fastening device 25 tothe top central portion of the door or gate. Mounted also on axle 26, Iprovide a relatively large gear 9, meshing with pinion 27. Pinion 27 ismounted on axle 28, which also carries gear 8. Gear '8 is a large gearwhich meshes with pinion 29. Pinion 29 is mounted on axle 30, andattached to axle 30 I also pro vide a brake drum 21. Axle 30 isconnected to and driven by an electric motor 7 As illustrated in Fi 1, Iprovide a brake shoe 1, pivotally attached to crank 31, which in turn issecured to one end of shaft 31,

f the other end of said shaft being secured to the end (if and operatedby T-arm 2-, the movement of which causes the application or release ofthe brake.

I'provide means for manually operating T-arm 2, consisting of a suitablecable 3 at tached to the arm 2 and run over a suitable pulley 32, andthence down to a position where it may be readily operated by anyone whowishes to open or close the door. Pulley 32 may be mounted on either theinside or the outside of the door frame at any convenient height.proximity to frame 24 in position to be engaged by the latches to bedescribed hereafter, I provide suitable spaced'guide strips '33, one ofwhich is extended downward as shown in Fig. 2, and to the end of whichextension a spring 34 is attached, the other end of the spring beingattached to member 2, to normally hold T-arm 2 in the position shown inFig. 1, the door being in lowered position. T-arm 2 is provided'with aslotted end'portion 35, shaped to receive and be engaged by either latch4 or latch 16, when the T-arm is operated.

I provide suitable spaced latches-an upper. latch 16 and lower latch4which are pivotally attached to and operated by tilting link or lever15, which has an extension.

or arm 14. Latches 16 and 4 are provided with springs 18 and 17,respectively, one end of each spring being secured to the adjacent latchand the other end of the spring secured to the latch guide piece 12.

Near the free end of arm 14, as shown in Fig. 1, I provide suitablespaced pins 50 and 51, engaging opposite sides of bent rod 13, whichmember operates lever 15. Bent rod 13 is disposed in spaced alinedrelation to frame 24, and is supported by suitable guide members 20attached to frame 24. Bent rod 13 is provided with a resetting arm 45which has its upper end loosely engaged over a novel sliding rod 44.Sliding rod 44 is provided with spaced adjustable collars 46 and 47,which are adjustably secured to rod 44 and which at certain stages inthe operation of the device contact with resetting arm 45 to operatethat member, andt-hrough it the bent rod and latches. Resetting arm 45is provided at its lower end with a triangular plate 52 which isoperatively engaged by a stud 48 carried by the T-arm 2, as shown inFig. 1.

To maintain T -arm 2 in The rear end of sliding rod 44 has attached toit a fixed bifurcated arm 43, which is in engagement with a grooved nut43, which latter member is mounted on and operated by the threaded endof threaded shaft 42, as shown in Fig. 3. Shaft 42 carries a gear orbeveled pinion 41 attached to its end and which meshes with pinion 40which is mounted on shaft 39, which shaft extends transversely of frame24, as shown in Fig. 3. Shaft 39 also carries a small gear 38 whichmeshes with a gear 49 attached to drum 11 and mounted on shaft 26.

Pivotally attached to the T-arm 2, 1 provide a suitable switch lever 36which is pivotally supported on frame 24 and which has its forward endoperatively connected by link 37 with an electric switch 6 which isoperated through its connection with T- arm 2. Electric swit-h 6 issuitably connected by insulated wi es 22 with the elecit to engage theclutch which acts as a safety I device.

In Fig. 1, thedoor or gate 19 is shown in.

closed position, with the electric switch 6 open, and the brake 1applied. The person i desiring to open the door pulls on cable 3,

which raises T-arm 2 from its lowermost position until its slotted end35 is engaged by latch 16. As T-arm 2 is thus raised it operates crankshaft 3 1*, crank 31 and brake shoe 1,'releasing the brake'shoe from itsengagement with brake drum 21, and at the same time closing the electricswitch 6, which sets the motor in operation and through the gears thatoperatively connect the motor with the cable drum 9, causes thecabledrum to wind the cable 10 and thus raise the door 19. I use noconnection on the door other than cable 10 for hoisting and direction,member 43is moved toward the cable drum, thereby drawing sliding rod 44toward drum 11. which is operatively attached to sliding rod 44 isengaged by adjustment collar 46 which The resetting arm 45 is movedtoward the drum 11 with sliding rod 44. The movement of resetting arm 45also moves bent rod 13 of which it is a part or to which it is aflixed,and the movement of bent rod 13 tilts lever 15 (through the engagementof guide pins 50 and 51 with opposite sides of bent rod 13, as shown inFig. 1) from the position shown in Fig. 1 to a reverse position, thusretracting latch 16.

\Vhen latch 16 is moved to retracted position by lever 15, the T-arm 2is released from its engagement with latch 16 and drops to its lowermostposition, operating the electric switch and brake ,as previouslydescribed.

The dropping of the T-arm 2 causes the resetting of latch 16, as stud 48carried by T-arm 2 strikes the adjacent slanting edge of triangularmember 52, operating it in a direction away from drum 1 and it in turnoperating bent rod 13, which tilts lever 15 to a position to set latch16 to the position shown in Fig.1, ready to engage the T-arm when thatmember is again raised.

Door 19 is closed by gravity when the apparatus is in the position shownin solid lines in Fig. 2, the electric switch 6 being open and the brake1 released from pressure against brake drum 21. As drum 11 is rotated tounwind cable 10 and lower the door, the shaft 42 is rotated through itsconnection with gears 41, 40, shaft 39, gears 38 and i 49 to drum 11,and the threaded nut 43 bifurcated arm 43 and sliding rod 44'are drivenin a direction away from drum 11 as shaft 42 turns in a left-handdirection. Collar '47, carried by sliding rod 4-1 is thus brou ht intocontact with resettin arm 45 moving that member and bent rod 13 to whichmember 45 is secured in a direction away from drum 11, tilting lever 15and operating the latches. The releasing of latch 4 from engagement withT-arm 2 results in" v the application of the brake and the stopping offurther movement of the door.

As the action of lever 15 produced by bent rod 13 is slight, theresetting arm 45 and triangular plate 52 and stud 48 carried by arm 2are introduced to force lever 15 fur-. ther in 'the desired direction toinsure the proper resetting of latches 4 and 16 to the proper positionfor the next operation of opening closing or "braking the furthermovement of the door.

By the improvement above described the operative connection of the dooropener with the door is reduced to the cable 10, other attachments tothe door are eliminated and the possibility of the apparatus beinginjured through a vehicle striking the door is obviated.

What I claim is:

1. In a power operated door opener, the combination of a motor, a cabledrum, a train of gears operatively connecting the cable drum and motor,braking means, cable attached to the cable drum and to the door to beoperated, a pivoted arm for setting the apparatus in and out ofoperation, means operatively connectingsaid pivoted arm with thebefore-mentioned braking means, an electrical motor control electricallyconnected with the motor and mechanically connected with the pivoted armto control the operation of the motor and application of the brakingmeans, space latched members arranged to be thrown into and out ofengagement with the end of the pivoted arm to lock or release thepivoted arm at predetermined times, a slidable bent rod disposed aboveand parallel with the top of the door and with which the latch membersare operatively connected, said bent rod being operatively related tothe pivoted arm, and means operatively connecting the bent rod with thecable drum to positively control the operation of the bent rod...

2. In a device of the class described, the

combination of a motor, a brake drum operatirely connected to the motor,a cable drum, a train of gears operatively connecting the cable drum andthe motor, a cable attached to the cable drum and having one end securedto the door to be operated, said cable constituting the only connectionbetween said power operated device and the door, a brake shoe for thebrake drum, means for applying the brake shoe to the brake drum, anelectric switch connected to said means, mean operatively connected withthe cable drum for controlling the operation of the electric switch atpredetermined times, means disposed above and free from the door forresetting latch control members at predetermined times, and theaforesaid latch control members.

3. In a device of the class described, the

combination of a power, operated door opener including a cable'attachedto the door to be operated, a cable drum to which said cable isattached, power means for controlling the operation of the cable, meansfor setting the device into and out of operation said mean including alatch controlled pivoted arm, and means for positively controlling theoperation of the pivoted arm and of the latch. controlling members, saidmeans being disposed above and free from the door, the above-mentionedcable constituting the only connection between the door opener and thedoor.

4. In a device of the class described, the combination of a poweroperated door opener including a cable attached to the door to beoperated, a cable drum to which said cable is attached, power means forcontrolling the operation of the cable, means for setting the deviceinto and out of operation including a brake, and means for positivelyregulating the operation of the device including a train oii gear andshafts operatively connected with the cable drum, a sliding rod operatedby the aforesaid gears and shafts, said rod having no direct connectionwith the door, adjustable collars carried by the sliding rod, a secondslidable member operated by the aforesaid slidable rod, latch membersregulating the operation of the motor and brake, said latch membersbeing operatively connected with the second slidable member, and meannormally holding the apparatus in a predetermined position. 5. Incombination with the apparatus described in claim 4, a triangle platemember carried by the second slidable 'member and arranged to be engagedby the means for setting the device into and out of operation when thatmember is operated to cause the positive resetting of the latch membersunder certain predetermined conditions, substantially as described.

ELMER LOVEJOY.

